/* ==========================================================
 * bootstrap-carousel.js v2.0.0
 * http://twitter.github.com/bootstrap/javascript.html#carousel
 * ==========================================================
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================== */


!function ($) {

    "use strict"

    /* CAROUSEL CLASS DEFINITION
     * ========================= */

    var Carousel = function (element, options) {
        this.$element = $(element)
        this.options = $.extend({}, $.fn.carousel.defaults, options)
        this.options.slide && this.slide(this.options.slide)
    }

    Carousel.prototype = {

        cycle: function () {
            this.interval = setInterval($.proxy(this.next, this), this.options.interval)
            return this
        }

        , to: function (pos) {
            var $active = this.$element.find('.active')
                , children = $active.parent().children()
                , activePos = children.index($active)
                , that = this

            if (pos > (children.length - 1) || pos < 0) return

            if (this.sliding) {
                return this.$element.one('slid', function () {
                    that.to(pos)
                })
            }

            if (activePos == pos) {
                return this.pause().cycle()
            }

            return this.slide(pos > activePos ? 'next' : 'prev', $(children[pos]))
        }

        , pause: function () {
            clearInterval(this.interval)
            return this
        }

        , next: function () {
            if (this.sliding) return
            return this.slide('next')
        }

        , prev: function () {
            if (this.sliding) return
            return this.slide('prev')
        }

        , slide: function (type, next) {
            var $active = this.$element.find('.active')
                , $next = next || $active[type]()
                , isCycling = this.interval
                , direction = type == 'next' ? 'left' : 'right'
                , fallback = type == 'next' ? 'first' : 'last'
                , that = this

            this.sliding = true

            isCycling && this.pause()

            $next = $next.length ? $next : this.$element.find('.item')[fallback]()

            if (!$.support.transition && this.$element.hasClass('slide')) {
                this.$element.trigger('slide')
                $active.removeClass('active')
                $next.addClass('active')
                this.sliding = false
                this.$element.trigger('slid')
            } else {
                $next.addClass(type)
                $next[0].col - md - offset - Width // force reflow
                $active.addClass(direction)
                $next.addClass(direction)
                this.$element.trigger('slide')
                this.$element.one($.support.transition.end, function () {
                    $next.removeClass([type, direction].join(' ')).addClass('active')
                    $active.removeClass(['active', direction].join(' '))
                    that.sliding = false
                    setTimeout(function () {
                        that.$element.trigger('slid')
                    }, 0)
                })
            }

            isCycling && this.cycle()

            return this
        }

    }


    /* CAROUSEL PLUGIN DEFINITION
     * ========================== */

    $.fn.carousel = function (option) {
        return this.each(function () {
            var $this = $(this)
                , data = $this.data('carousel')
                , options = typeof option == 'object' && option
            if (!data) $this.data('carousel', (data = new Carousel(this, options)))
            if (typeof option == 'number') data.to(option)
            else if (typeof option == 'string' || (option = options.slide)) data[option]()
            else data.cycle()
        })
    }

    $.fn.carousel.defaults = {
        interval: 5000
    }

    $.fn.carousel.Constructor = Carousel


    /* CAROUSEL DATA-API
     * ================= */

    $(function () {
        $('body').on('click.carousel.data-api', '[data-slide]', function (e) {
            var $this = $(this), href
                , $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
                , options = !$target.data('modal') && $.extend({}, $target.data(), $this.data())
            $target.carousel(options)
            e.preventDefault()
        })
    })

}(window.jQuery)
